Orbital refueling could unlock long-distance space travel, but microgravity and cryogenics make it one of aerospace's ...

The Perseids peak this week—but light pollution could dim the show for Chicagoland. Here's how to get the best view.

The Perseids are one of the most anticipated meteor showers of the year, known for their fast-moving fireballs.

It’s the largest piece of Mars ever found on Earth — a 54-pound (25-kilogram) meteorite that fetched more than $5 million at a New York auction last month, setting a world ...

The best time to watch a meteor shower is in the early predawn hours when the moon is low in the sky. Competing sources of ...